WO2018058504A1 - Circuit de table de code sans fil de 2,4 ghz - Google Patents

Circuit de table de code sans fil de 2,4 ghz Download PDF

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Publication number
WO2018058504A1
WO2018058504A1 PCT/CN2016/101033 CN2016101033W WO2018058504A1 WO 2018058504 A1 WO2018058504 A1 WO 2018058504A1 CN 2016101033 W CN2016101033 W CN 2016101033W WO 2018058504 A1 WO2018058504 A1 WO 2018058504A1
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WO
WIPO (PCT)
Prior art keywords
pin
circuit
capacitor
resistor
chip
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PCT/CN2016/101033
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English (en)
Chinese (zh)
Inventor
王亚斌
谌海鸥
Original Assignee
深圳博芯科技股份有限公司
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Application filed by 深圳博芯科技股份有限公司 filed Critical 深圳博芯科技股份有限公司
Priority to PCT/CN2016/101033 priority Critical patent/WO2018058504A1/fr
Priority to CN201680009879.3A priority patent/CN107438768B/zh
Publication of WO2018058504A1 publication Critical patent/WO2018058504A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
    • G01P3/54—Devices characterised by the use of electric or magnetic means for measuring linear speed by measuring frequency of generated current or voltage

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a 2.4 GHz wireless code table circuit.
  • the wireless code meter speed detecting device is mainly a reed switch and a magnet.
  • the reed switch is also called a reed switch. It is a special switch with magnetic sensitivity. When the magnet is close to the reed switch, the inside of the reed switch is turned on, when the magnet is followed by The distance of the reed pipe is greater than When 3 to 5 cm, the reed switch will open, so that close detection can be achieved.
  • wireless code meters on the market generally have problems of low reliability and high power consumption.
  • the technical problem to be solved by the present invention is to provide a 2.4 GHz wireless code table circuit capable of reducing power consumption, increasing the speed detection range, and improving the reliability of the wireless code table in view of the above-mentioned drawbacks of the prior art.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to construct a 2.4 GHz a wireless code table circuit comprising a pulse detection transmitting circuit and a receiving display circuit, the pulse detecting transmitting circuit comprising a power supply circuit, a first low voltage reset circuit, a pulse detecting circuit and a 2.4 GHz wireless transmitting circuit,
  • the 2.4 GHz wireless transmitting circuit includes a ninth 2.4G wireless transceiver chip and a first antenna matching circuit, the pulse detecting circuit including a reed switch, the ninth 2.4G The pulse detection interrupt pin of the wireless transceiver chip is grounded through the reed switch.
  • the ninth 2.4G The wireless transceiver chip has a built-in timer. When the timer overflows, the ninth 2.4G wireless transceiver chip sends the detected number of pulses to the receiving display circuit through the first antenna matching circuit.
  • the power circuit is connected to one end of the first low voltage reset circuit, and the other end of the first low voltage reset circuit is connected to a power input pin of the ninth 2.4G wireless transceiver chip.
  • the first antenna matching circuit includes a first one hundred and fifteenth capacitor, a first one hundred and twenty capacitors, a one hundred and eleventh inductor, and a second antenna, and the first one hundred and fifteenth capacitor One end with the ninth 2.4G
  • the seventh pin of the wireless transceiver chip is connected, and the other end of the first one hundred and fifteenth capacitor is connected to one end of the first one hundred and eleven inductors, and the other end of the first one hundred and eleventh inductor is respectively One end of the first one hundred and twenty capacitors is connected to one end of the second antenna, and the other end of the first one hundred and twenty capacitors and the other end of the second antenna are grounded.
  • the power circuit includes a button battery and a one hundred and eleventh capacitor
  • the first low voltage reset circuit includes a tenth low voltage reset chip and a one hundred and thirteenth resistor
  • the ninth 2.4G The other pin of the wireless transceiver chip is a tenth pin, one end of the button battery and one end of the first one hundred and eleven capacitors are grounded, and the other end of the button battery and the first one hundred and ten
  • the other end of a capacitor is connected to the second pin of the tenth low voltage reset chip, the first pin of the tenth low voltage reset chip is grounded, and the second pin of the tenth low voltage reset chip is also respectively One end of the one hundred and thirteenth resistor and the ninth
  • the power output pin of the 2.4G wireless transceiver chip is connected, and the other end of the one hundred and thirteenth resistor is respectively connected with the third pin of the tenth low voltage reset chip and the ninth 2.4G
  • the receiving display circuit comprises a step-down circuit, a second low voltage reset circuit, 2.4GHz receiving circuit, Bluetooth audio interface circuit, dial stepping motor, LCD driving display circuit and LCD driving selection circuit
  • the 2.4GHz receiving circuit includes the seventh 2.4GHz a wireless transceiver chip and a second antenna matching circuit, the second antenna matching circuit comprising a first antenna, a fifth capacitor, a twenty-sixth capacitor, and a fourth inductor, the seventh 2.4 GHz
  • the thirteenth pin of the wireless transceiver chip is respectively connected to one end of the fifth capacitor and one end of the twenty-six capacitor through the fourth inductor, and the other end of the twenty-six capacitor is grounded, the fifth The other end of the capacitor is connected to one end of the first antenna, the other end of the first antenna is grounded, the step-down circuit is connected to the second low voltage reset circuit, and the second low voltage reset circuit is further seventh 2.4GHz wireless transceiver chip connection, the Bluetooth audio interface circuit, the dial stepping motor, LCD driving display circuit and LCD driving selection
  • the step-down circuit includes a first step-down chip, a first capacitor, a second capacitor, a third capacitor, an eleventh capacitor, and a twelfth capacitor
  • the second The low voltage reset circuit includes a first low voltage reset chip and a twelfth resistor, a first pin of the first buck chip is respectively connected to one end of the first capacitor and one end of the second capacitor, and the other end of the first capacitor and the other end of the second capacitor are grounded, the first drop
  • the first pin of the chip is also connected to the third pin, the second pin of the first buck chip is grounded, and the fourth pin of the first buck chip is grounded through the third capacitor.
  • a fifth pin of the first step-down chip is respectively connected to one end of the eleventh capacitor and one end of the twelfth capacitor
  • a first pin of the first low voltage reset chip is respectively connected to one end of a thirteenth pin and a twelfth resistor of the seventh 2.4 GHz wireless transceiver chip
  • the second pin of the first low voltage reset chip is grounded
  • said third pin of the first low voltage reset chip is respectively connected to the other end of the twelfth resistor and the fifth pin of the first step-down chip.
  • the Bluetooth audio interface circuit includes a Bluetooth audio interface, a third resistor, a fourth resistor, a sixth resistor, a seventh resistor, a tenth resistor, a twenty-first resistor, a twenty-second resistor, and a third a twenty-third resistor and a thirty-first resistor, wherein the first pin, the ninth pin and the twelfth pin of the Bluetooth audio interface are connected, and the third pin of the Bluetooth audio interface passes the sixth resistor One end and the seventh end of the tenth resistor, respectively A forty-ninth pin connection of the 2.4 GHz wireless transceiver chip, the eighth pin of the Bluetooth audio interface passes the thirty-first resistor and the seventh 2.4 GHz a seventh pin connection of the wireless transceiver chip, the thirteenth pin of the Bluetooth audio interface passes the third resistor and the seventh 2.4 GHz a twenty-sixth pin connection of the wireless transceiver chip, the fourteenth pin of the Bluetooth audio
  • the LCD The driving selection circuit includes a fifth analog switch, a sixth analog switch, an eighth analog switch, an eighth capacitor, a ninth capacitor, a first resistor, a second resistor, and a fourth transistor, the first of the fifth analog switch Pin with the seventh 2.4GHz
  • An eighth pin connection of the wireless transceiver chip, a second pin of the fifth analog switch, a second pin of the sixth analog switch, and a second pin of the eighth analog switch are grounded, the fifth analog switch a third pin connected to the second pin of the Bluetooth audio interface, a fifth pin of the fifth analog switch, a fifth pin of the sixth analog switch, and a fifth pin of the eighth analog switch Connected to one end of the eighth capacitor and one end of the ninth capacitor respectively, the other end of the eighth capacitor and the other end of the ninth capacitor are grounded, and the sixth pin and the sixth simulation of the fifth analog switch are respectively a sixth pin of the switch and a sixth pin of the eighth analog switch are both connected to a collector of the fourth transistor
  • the LCD driving display circuit includes an LCD driving chip and an LCD. a first pin, a second pin, a third pin, a fourth pin, a fifth pin, and a sixth pin of the LCD driver chip, the ninth resistor, the seventh capacitor, and the sixteenth capacitor a seventh pin and an eighth pin respectively with the LCD
  • the twelfth pin, the eleventh pin, the ninth pin, the eighth pin, the seventh pin, the sixth pin, and the fifth pin of the screen are correspondingly connected
  • the ninth lead of the LCD driver chip a pin is connected to a fourth pin of the fifth analog switch
  • An eleventh pin of the LCD driver chip is connected to a fourth pin of the sixth analog switch
  • a twelfth pin of the LCD driver chip is connected to a fourth pin of the eighth analog switch
  • LCD a sixteenth pin of the driving chip is respectively connected to one end of the seventh capacitor and one end of the sixteenth capacitor through the ninth resistor, and the other end of the seventh capacitor and the other end of the
  • the first pin of the dial stepper motor and the seventh 2.4 GHz a twenty-third pin, a twenty-fourth pin and a twenty-fifth pin connection of the wireless transceiver chip, the second pin of the dial stepper motor and the seventh 2.4 GHz a twentieth pin, a twenty-first pin, and a twenty-second pin connection of the wireless transceiver chip, the third pin of the dial stepper motor and the seventh 2.4 GHz a thirty-fourth pin, a thirty-fifth pin and a thirty-sixth pin connection of the wireless transceiver chip, the fourth pin of the dial stepping motor and the seventh 2.4 GHz
  • the seventeenth, eighteenth and nineteenth pins of the wireless transceiver chip are connected.
  • the receiving display circuit further includes a dashboard LED driving circuit
  • the LED driving circuit includes a third transistor, a twenty-eighth resistor, a twenty-ninth resistor, and a thirtieth resistor, and a base of the third transistor passes the second eighteen resistor and the seventh 2.4GHz a fortieth pin connection of the wireless transceiver chip, a collector of the third transistor is connected to a sixth pin of the dial stepper motor, and one end of the thirtieth resistor and the dial stepper motor The fifth pin is connected, and the other end of the thirtieth resistor is connected to the twenty-ninth resistor.
  • the 2.4 GHz wireless code table circuit embodying the present invention has the following beneficial effects: due to the provision of a pulse detection circuit and 2.4 GHz
  • the wireless transmitting circuit includes a ninth 2.4G wireless transceiver chip and a first antenna matching circuit
  • the pulse detecting circuit includes a reed switch. When the magnet is within the detection distance of the reed switch, the inside of the reed switch is turned on.
  • the wireless transceiver chip wakes up the number of detection pulses by the interrupt function, and periodically wakes up by the timer, and sends the number of pulses detected in the timing period to the receiving display circuit, compared with the prior art. It can reduce power consumption, improve speed detection range, and improve the reliability of wireless code meters.
  • FIG. 1 is a circuit schematic diagram of a pulse detection transmitting circuit in an embodiment of a 2.4 GHz wireless code table circuit of the present invention
  • FIG. 2 is a circuit schematic diagram of a 2.4 GHz receiving circuit in the embodiment
  • FIG. 3 is a circuit schematic diagram of the step-down circuit and the second low-voltage reset circuit in the embodiment
  • FIG. 4 is a circuit schematic diagram of a Bluetooth audio interface circuit in the embodiment
  • FIG. 5 is a circuit schematic diagram of an LCD driving selection circuit in the embodiment
  • FIG. 6 is a circuit schematic diagram of an LCD driving display circuit in the embodiment.
  • Figure 7 is a circuit schematic diagram of the stepper motor of the dial in the embodiment.
  • Figure 8 is a circuit schematic diagram of the LED driving circuit of the instrument panel in the embodiment.
  • FIG. 9 is a circuit schematic diagram of an LCD backlight driving circuit in the embodiment.
  • FIG. 10 is a circuit schematic diagram of a second crystal oscillation circuit in the embodiment.
  • Figure 11 is a schematic illustration of the online burning test points in the described embodiment.
  • the 2.4 GHz wireless coder circuit includes a pulse detecting transmitting circuit and a receiving display circuit (not shown), and the pulse detecting transmitting circuit and the receiving display circuit communicate by wireless.
  • the circuit schematic diagram of the pulse detection transmitting circuit is as shown in the figure 1 is shown.
  • the pulse detecting transmitting circuit includes a power supply circuit 110, a first low voltage reset circuit 111, a pulse detecting circuit, and a 2.4 GHz wireless transmitting circuit.
  • the 2.4 GHz wireless transmitting circuit includes a ninth 2.4G wireless transceiver chip U9 and a first antenna matching circuit 112.
  • the pulse detection circuit includes the reed switch G1, and the pulse detection interrupt pin P10 of the ninth 2.4G wireless transceiver chip U9 (ie, the ninth 2.4G wireless transceiver chip U9)
  • the twenty-third pin is grounded through the reed switch G1.
  • ninth 2.4G wireless transceiver chip U9 has built-in timer (not shown), when the timer overflows, the ninth 2.4G wireless transceiver chip U9 The detected number of pulses is sent to the receiving display circuit through the first antenna matching circuit 112, and the power supply circuit 110 is connected to one end of the first low voltage reset circuit 111, and the first low voltage reset circuit The other end of 111 is connected to the power input pins VDDPA and VCCRF of the ninth 2.4G wireless transceiver chip U9.
  • the pulse detection interrupt pin P10 of the ninth 2.4G wireless transceiver chip U9 Programmable input and output function, when set to input, enables external interrupt function and internal programmable pull-up function. That is, the pulse detection interrupt pin P10 of the ninth 2.4G wireless transceiver chip U9 With external interrupt, internal pull-up function.
  • the ninth 2.4G wireless transceiver chip U9 Directly enters sleep, its power consumption will be very large, it needs to set its pulse detection interrupt pin P10 to output low level before entering hibernation, the ninth 2.4G wireless transceiver chip U9 Periodically wake-up detection of the above-mentioned pulse detection interrupt pin P10 by turning on the timer wake-up function Whether it is low level, if it is not low level, it is set as input, with pull-up, enable external interrupt function, turn off timer wake-up function and go to sleep. If it is low, it is still set low, goes to sleep, and then loops accordingly.
  • the ninth 2.4G wireless transceiver chip U9 When the tire rotates normally, if the magnet is not within the detection distance of the reed switch G1, the ninth 2.4G wireless transceiver chip U9 The pulse detection interrupt pin P10 is high level, and the ninth 2.4G wireless transceiver chip U9 enters the sleep mode.
  • the reed switch G1 Internal conduction, ninth 2.4G wireless transceiver chip U9 pulse detection interrupt pin P10 generates low level, the ninth 2.4G wireless transceiver chip U9 is woken up, when the timer overflows, and the number of pulses is not 0, the ninth 2.4G wireless transceiver chip U9 The number of detected pulses is sent to the receiving display circuit.
  • the invention greatly reduces the power consumption of the pulse detection transmitting circuit of the wireless code table, and improves the reliability of the wireless code table and the like.
  • the first antenna matching circuit 112 includes a first one hundred and fifteen capacitors C115 and a first one hundred and twenty capacitors C120.
  • the seventh pin connection, the other end of the one hundred and fifteenth capacitor C115 is connected to one end of the one hundred and eleventh inductor L111, and the other end of the one hundred and eleventh inductor L111 is respectively connected with the first one hundred and twenty capacitors
  • One end of the C120 is connected to one end of the second antenna ANT2, and the other end of the first one hundred and twenty capacitors C120 and the other end of the second antenna ANT2 are grounded.
  • the ninth 2.4G wireless transceiver chip U9 The twenty-seventh pin, the twenty-eighth pin, the twenty-ninth pin, and the thirtieth pin are all connected to the online burning test point.
  • the power circuit 110 includes a button battery BT2 and a one hundred and eleventh capacitor C111.
  • the first low voltage reset circuit 111 includes a tenth low voltage reset chip U10 and a one hundred and thirteenth resistor R113, and the ninth 2.4G wireless transceiver chip U9
  • the other pin is the tenth pin, one end of the button battery BT2 and one end of the one hundred and eleventh capacitor C111 are grounded, the other end of the button battery BT2 and the one hundred and eleventh capacitor C111 The other end is connected to the second pin of the tenth low voltage reset chip U10, the first pin of the tenth low voltage reset chip U10 is grounded, and the second pin of the tenth low voltage reset chip U10 is also respectively connected with the one hundred and tenth Three resistor One end of R113 and the ninth 2.4G wireless transceiver chip U9 power input pin VDDPA, VCCRF connection, one hundred and thirteenth resistor R113 The other end is connected to the third pin of the ten
  • the tenth low-voltage reset chip U10 is 2.2V Low-voltage reset chip, when the voltage of the button battery BT2 is lower than 2.2V, the tenth low-voltage reset chip U10 outputs a low level reset ninth 2.4G wireless transceiver chip U9.
  • the pulse detecting and transmitting circuit may further expand.
  • the pulse detecting and transmitting circuit may further include a first crystal oscillator circuit 113 and an LED state display circuit 114. , pairing button detection pin 115, etc.
  • the receiving display circuit includes a buck circuit 210, a second low voltage reset circuit 211, and 2.4 GHz.
  • Receiving circuit, Bluetooth audio interface circuit 212, dial stepping motor J1, LCD driving display circuit 213 and LCD driving selection circuit 214, FIG. 2 is in this embodiment
  • the circuit schematic diagram of the 2.4GHz receiving circuit is a circuit schematic diagram of the step-down circuit and the second low-voltage reset circuit in the embodiment
  • FIG. 4 is a circuit schematic diagram of the Bluetooth audio interface circuit in the embodiment
  • FIG. 6 is a circuit schematic diagram of the LCD driving display circuit in the embodiment
  • FIG. 7 is the embodiment. Circuit diagram of the stepper motor of the dial.
  • the 2.4 GHz receiving circuit includes a seventh 2.4 GHz wireless transceiver chip U7 and a second antenna matching circuit 217.
  • the second antenna matching circuit 217 includes a first antenna ANT1, a fifth capacitor C5, a twenty-sixth capacitor C26, and a fourth inductor L4, and a seventh 2.4 GHz wireless transceiver chip U7.
  • the thirteenth pin is connected to one end of the fifth capacitor C5 and one end of the twenty-sixth capacitor C26 through the fourth inductor L4, and the other end of the twenty-sixth capacitor C26 is grounded, and the fifth capacitor C5
  • the other end is connected to one end of the first antenna ANT1, the other end of the first antenna ANT1 is grounded, the step-down circuit 210 is connected to the second low voltage reset circuit 211, and the second low voltage reset circuit 211 Also connected to the seventh 2.4GHz wireless transceiver chip U7, Bluetooth audio interface circuit 212, dial stepper motor J1, LCD drive display circuit 213 and LCD drive selection circuit
  • the 214 is connected to the seventh 2.4GHz wireless transceiver chip U7.
  • the buck circuit 210 includes a first buck chip U1, a first capacitor C1, and a second capacitor C2.
  • the third capacitor C3, the eleventh capacitor C11 and the twelfth capacitor C12, the step-down circuit 210 reduces the lithium battery voltage to 3V, and the first step-down chip U1 is 3V.
  • the buck chip, the second low voltage reset circuit 211 includes a first low voltage reset chip Q1 and a twelfth resistor R12, and the first low voltage reset chip Q1 is a 2.2V low voltage reset chip, when the lithium battery voltage is lower than
  • the first low-voltage reset chip at 2.2V Q1 outputs a low level and resets U7.
  • the seventh 2.4GHz wireless transceiver chip U7's twenty-seventh pin has ADC function, and the thirteenth resistor R13 and the 24th resistor R24 form a lithium battery voltage detection circuit.
  • the first pin of the first buck chip U1 is respectively connected to one end of the first capacitor C1 and the second capacitor C2. One end is connected, the other end of the first capacitor C1 and the other end of the second capacitor C2 are grounded, and the first pin of the first buck chip U1 is also connected to the third pin thereof, the first buck chip U1
  • the second pin is grounded, and the fourth pin of the first buck chip U1 is grounded through the third capacitor C3, and the fifth pin of the first buck chip U1 and the eleventh capacitor C11 and the twelfth capacitor respectively C12
  • One end of the first low voltage reset chip Q1 is connected to the third pin of the seventh 2.4 GHz wireless transceiver chip U7 and one end of the twelfth resistor R12, the first low voltage reset chip
  • the second pin of Q1 is grounded, and the third pin of the first low voltage reset chip Q1 is connected to the other end of the twelfth resistor R12 and the fifth pin of the first buck chip U1.
  • the Bluetooth audio interface circuit 212 includes a Bluetooth audio interface J3, a third resistor R3, and a fourth resistor R4. , sixth resistor R6 , seventh resistor R7 , tenth resistor R10 , twenty-first resistor R21 , twenty-second resistor R22 , twenty-third resistor R23 and thirty-first resistor R31 , Bluetooth audio interface J3's first pin, ninth pin and twelfth pin connection, Bluetooth audio interface J3's third pin through the sixth resistor R6 and the tenth resistor R10 one end and the seventh 2.4GHz wireless transceiver chip U7's forty-ninth pin connection, Bluetooth audio interface J3's eighth pin through the thirty-first resistor R31 and the seventh 2.4GHz wireless transceiver chip U7 The seventh pin is connected.
  • the sixth resistor R6 and the tenth resistor R10 constitute a 5V charging power source detecting circuit, and when it is detected that the plug-in power source is 5V, the charging power source is at
  • Bluetooth audio interface J3's thirteenth pin through the third resistor R3 and the seventh 2.4GHz wireless transceiver chip U7 The twenty-sixth pin connection, the Bluetooth audio interface J3's fourteenth pin is connected to the fifty-sixth pin of the seventh 2.4GHz wireless transceiver chip U7 through the fourth resistor R4, Bluetooth audio interface J3
  • the fifteenth pin is connected to the fifty-fifth pin of the seventh 2.4 GHz wireless transceiver chip U7 through the seventh resistor R7, and the eighteenth pin of the Bluetooth audio interface J3 passes the twenty-first resistor R21 and the seventh.
  • the fifty-first pin connection, Bluetooth audio interface J3's twentieth pin is connected to the fiftieth pin of the seventh 2.4GHz wireless transceiver chip U7 through the twenty-third resistor R23.
  • Bluetooth audio interface J3's second, fourth and fifth pins are Bluetooth audio IC control LCD driver IC Control pin
  • Bluetooth audio interface J3's seventh pin is Bluetooth audio IC sleep mode detection pin
  • Bluetooth audio interface J3's eighth pin is flashlight LED drive control pin
  • Bluetooth audio interface J3 The thirteenth pin is the charge state detection pin, the high level is full, the low level is charging; the Bluetooth audio interface J3 The fourteenth pin, fifteenth pin, sixteenth pin, seventeenth pin, eighteenth pin and nineteenth pin are Bluetooth audio button pins, and the second of the Bluetooth audio interface J3 Ten pins for Bluetooth audio IC Power supply control pin.
  • the LCD driving selection circuit 214 includes a fifth analog switch U5 and a sixth analog switch U6.
  • the eighth analog switch U8 is used to implement the LCD independent display function of the two modes of the 2.4GHz wireless code table circuit.
  • the fifth analog switch U5 's first pin and the seventh 2.4GHz
  • the eighth pin of the wireless transceiver chip U7 is connected, the second pin of the fifth analog switch U5, the second pin of the sixth analog switch U6, and the second pin of the eighth analog switch U8 are grounded, and the fifth analog switch U5
  • the third pin is connected to the second pin of the Bluetooth audio interface J3, the fifth pin of the fifth analog switch U5, the fifth pin of the sixth analog switch U6, and the fifth pin of the eighth analog switch U8.
  • One end of C8 is connected to one end of the ninth capacitor C9, the other end of the eighth capacitor C8 and the other end of the ninth capacitor C9 are grounded, and the fifth analog switch U5
  • the sixth pin, the sixth pin of the sixth analog switch, and the sixth pin of the eighth analog switch are both connected to the collector of the fourth transistor Q4, and the first pin of the sixth analog switch U6 is Seven 2.4GHz wireless transceiver chip
  • the ninth pin of U7 is connected, the third pin of the sixth analog switch U6 is connected to the fourth pin of the Bluetooth audio interface J3, and the first pin of the eighth analog switch U8 is connected with the seventh 2.4 GHz wireless transceiver chip.
  • the tenth pin of U7 is connected, the third pin of the eighth analog switch U8 is connected with the fifth pin of the Bluetooth audio interface J3, and the collector of the fourth transistor Q4 is also connected with the second resistor R2, the fourth three Tube Q4
  • the base is connected to the twenty-ninth pin of the seventh 2.4 GHz wireless transceiver chip U7 through the first resistor R1, and the emitter of the fourth transistor Q4 is grounded.
  • the seventh 2.4GHz wireless transceiver chip U7 controls the LCD.
  • the display circuit 213 is displayed for display; when SW_EN_BK is output 1, the Bluetooth audio IC controls the LCD driver display circuit 213 for display.
  • the LCD driving display circuit 213 includes an LCD driving chip U2 and an LCD screen J2.
  • the first pin, the second pin, the third pin, the fourth pin, the fifth pin, the sixth pin, the seventh pin, and the eighth pin are respectively associated with the LCD panel J2
  • the twelfth pin, the eleventh pin, the ninth pin, the eighth pin, the seventh pin, the sixth pin, and the fifth pin are connected
  • the ninth pin of the LCD driving chip U2 is The fourth pin of the fifth analog switch U5 is connected
  • the eleventh pin of the LCD driver chip U2 is connected to the fourth pin of the sixth analog switch U6, and the twelfth pin of the LCD driver chip U2 is connected to the fourth pin of the eighth analog switch U8, LCD
  • the sixteenth pin of the driving chip U2 is connected to one end of the seventh capacitor C7 and one end of the sixteenth capacitor C16 through the ninth resistor R9, and the other
  • LCD driver chip U2's 21st, 22nd, 23rd, and twentieth pins are respectively connected to the LCD screen J2
  • the first pin, the second pin, the third pin, and the fourth pin are connected, and the LCD driver chip U2
  • the forty-first pin, the forty-second pin, the forty-third pin, the forty-fourth pin, the forty-fifth pin, the forty-sixth pin, the forty-seventh pin, and The forty-eighth pin is respectively associated with the LCD screen J2
  • the twentieth pin, the nineteenth pin, the eighteenth pin, the seventeenth pin, the sixteenth pin, the fifteenth pin, the fourteenth pin, and the thirteenth pin are connected. .
  • the seventh 2.4GHz wireless transceiver chip U7's seventeenth pin output low level, the seventh 2.4GHz wireless transceiver chip U7 Responsible for initializing LCD display chip U2 and LCD display.
  • the seventeenth pin of the seventh 2.4GHz wireless transceiver chip U7 outputs a high level, the LCD screen J2 is responsible for the LCD. Display.
  • Figure 7 is a circuit schematic diagram of the stepper motor of the dial in the embodiment.
  • the thirty-fourth, thirty-fifth and thirty-sixth pin connections, the fourth step of the dial stepper motor J1 and the seventh 2.4GHz wireless transceiver chip U7 The seventeenth, eighteenth and nineteenth pins are connected.
  • the IO port of the seventh 2.4 GHz wireless transceiver chip U7 directly drives the dial stepping motor J1, in order to satisfy the dial stepping motor. J1 drive current, which is driven directly by 3 IO ports per line.
  • the receiving display circuit further includes an instrument panel LED driving circuit
  • FIG. 8 is the instrument panel LED in the embodiment.
  • the instrument panel LED driver circuit includes a third transistor Q3, a twenty-eighth resistor R28, a twenty-ninth resistor R29, and a thirtieth resistor R30.
  • the base of the third transistor Q3 is connected to the fortieth pin of the seventh 2.4 GHz wireless transceiver chip U7 through the twenty-eighth resistor R28, and the collector and dial stepping motor of the third transistor Q3 is J1.
  • the sixth pin is connected, one end of the thirtieth resistor R30 is connected to the fifth pin of the dial stepping motor J1, and the other end of the thirtieth resistor R30 is connected to the twenty-ninth resistor R29.
  • the receiving display circuit may further expand, for example, the receiving display circuit may further include an LCD.
  • 9 is a circuit schematic diagram of an LCD backlight driving circuit in the embodiment;
  • FIG. The circuit schematic diagram of the second crystal oscillation circuit in this embodiment;
  • FIG. 11 is a schematic diagram of the online burning test point in the embodiment.
  • the ninth 2.4G wireless transceiver chip U9 detects its pulse detection interrupt pin P10. The number of pulses is sent to the seventh 2.4 GHz wireless transceiver chip U7 of the receiving display circuit, and the seventh 2.4 GHz wireless transceiver chip U7 Instantaneous speed, mileage, total mileage, riding time and average speed calculated by the software through the LCD screen J2 Displayed and instantly displayed instantly through the dashboard.
  • the invention optimizes the wireless code table pulse detection transmitting circuit, reduces the power consumption, improves the speed detection range, and improves the reliability of the wireless code table on the basis of realizing the wireless code table function and ensuring the reliability thereof.

Abstract

L'invention concerne un circuit de table de code sans fil de 2,4 GHz comprenant un circuit de transmission de détection d'impulsion et un circuit d'affichage de réception, le circuit de transmission de détection d'impulsion comprenant un circuit d'alimentation électrique (110), un premier circuit de réinitialisation à basse tension (111), un circuit de détection d'impulsion et un circuit de transmission sans fil de 2,4 GHz; le circuit de transmission sans fil de 2,4 GHz comprend une neuvième puce d'émission-réception sans fil de 2.4G (U9) et un premier circuit d'adaptation d'antenne (112); une broche d'interruption de détection d'impulsion (P10) de la neuvième puce d'émission-réception sans fil 2.4G (U9) est mise à la terre par l'intermédiaire d'un commutateur à lames (G1); lorsqu'un aimant se trouve à l'intérieur d'une plage de distance de détection du commutateur à lames (G1), l'intérieur du commutateur à lames (G1) est conduit, et lorsque l'aimant est à l'extérieur de la plage de distance de détection du commutateur à lames (G1), l'intérieur du commutateur à lames (G1) est un circuit ouvert; un temporisateur est intégré dans la neuvième puce d'émission-réception sans fil 2.4G (U9); et lorsque le temporisateur dépasse, la neuvième puce d'émission-réception sans fil 2.4G (U9) envoie le nombre détecté d'impulsions au circuit d'affichage de réception par l'intermédiaire du premier circuit d'adaptation d'antenne (112). Le circuit de table de code sans fil de 2,4 GHz permet de réduire la consommation d'énergie, d'augmenter une plage de détection de vitesse et d'améliorer la fiabilité d'une table de code sans fil.
PCT/CN2016/101033 2016-09-30 2016-09-30 Circuit de table de code sans fil de 2,4 ghz WO2018058504A1 (fr)

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PCT/CN2016/101033 WO2018058504A1 (fr) 2016-09-30 2016-09-30 Circuit de table de code sans fil de 2,4 ghz
CN201680009879.3A CN107438768B (zh) 2016-09-30 2016-09-30 2.4GHz无线码表电路

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PCT/CN2016/101033 WO2018058504A1 (fr) 2016-09-30 2016-09-30 Circuit de table de code sans fil de 2,4 ghz

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